SU1585271A2 - Magnetic gripper - Google Patents

Abstract

This invention relates to magnetic load handling devices. The purpose of the invention is to improve the reliability and performance of the magnetic capture. A magnetically auxiliary auxiliary magnetic circuit 6, which closes the side surfaces of the magnetically soft pole plates 3, is added to the gripper. km - surface area of the magnetic contact of the pole plates with an auxiliary magnetic circuit, m 2

S MP is the cross-sectional area of the auxiliary magnetic circuit in the gap between the pole plates, m 2. Thanks to the introduction of the auxiliary magnetic circuit, it is possible to almost completely eliminate the uncompensated residual magnetic flux and eliminate sticking of ferromagnetic junk, which reduces the strength of holding the magnetic gripper in the active state. 1 il.

Description

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The invention relates to 1 magnetic lifting devices and is designed to reliably grip and hold ferromagnetic loads during transportation, assembly, welding.

The aim of the invention is to increase the reliability and performance of the magnetic pickup.

The drawing schematically shows a magnetic grip.

The magnetic gripper contains a remagable 1 and nonremagnetisable 2 standing magnets placed between the magnetized vertical plates 3,

magnet soft inserts 4 located

Control 5 is energized by a current pulse in such a direction that the magnetisable permanent magnet 1 is magnetized according to (indicated by the letters / V and S in brackets) the non-magnetized permanent magnet 2. In this case These magnets are closed between their opposite poles through magnetically 10 soft vertical plates 3 and magnetically soft inserts 4. The uncompensated residual magnetic flux of both magnets is closed through the vertical challed plates 3 along the auxiliary magnetic conductor between the magnetically flexible vertical plate 6. At the same time, thanks to the appropriate choice of the cross section of the auxiliary magnetic conductor, in which the uncompensated residual flow does not saturate the material of the auxiliary magnetic conductor, the vertical shunt in the magnetic relation is almost equal to zero. This causes the working magnetic flux to be zero and the load holding force 7.

Tins and pole ends of a non-reversible permanent magnet, an electrical control winding 5 placed on a permanently reversible magnet, a magnetically soft auxiliary magnetic conductor 6, closing the ends of the magnetically soft 20 vertical plates, held by a ferromagnetic load 7.

The parameters and material of the indicated elements of the device are chosen so that the contact surface area of each vertical from the shank plate with the auxiliary magnetic conductor should be not less than ten cross-sectional areas of the latter. In addition, the cross-sectional area of the auxiliary magnetic core between the vertical plates without magnetisable and re-magnetized permanent magnets, as well as the induction of technical magnetic saturation of the auxiliary magnetic core material and the residual magnetic induction of the materials to the unsubstantial cross-section selection of the auxiliary magnetic core, at which there is an uncompensated residual flux of a casing section that does not compensate for the auxiliary magnetic core, which is uncompensated for the residual magnetic flux, and the residual magnetic induction of the auxiliary magnetic core at which there is an uncompensated residual flux of a non-cave choice of the cross section of the auxiliary magnetic circuit, at which the residual magnetic flux is not compensated, where the residual magnetic induction of the auxiliary magnetic core is not compensated, at which there is an uncompensated residual flux of a casing section of the auxiliary magnetic circuit, which is uncompensated for the residual magnetic flux, and the residual magnetic induction of the auxiliary magnetic core is unprofitable. auxiliary magnetic circuit, the latter magnetically shunts the verti Caliber plates, the potential difference between which is practically zero. This causes the working magnetic flux to be zero and the load holding force 7.

To seize the load 7 (transferring the magnetic gripping to the passive state), a control current is applied to the control winding 5 in such a direction that the reversible permanent magnet 1 becomes magnetized opposite (indicated by the letters / V and S without brackets) to the nonremagnetized permanent magnet 2. In this case, the flux of both magnets is summed, closing through the magnetically soft inserts 4, the vermagnetizable and remagnetized pictorial plates 3, the working magnetic

the gap and the ferromagnetic load 7. A part of the total magnet of the first flow branches into the auxiliary magnetic circuit 6, which, due to the saturation of its material, takes up a small part of the total magnetic flux.

hundred hjehhh

magnets are in the ratio .., -§m

 Vgn-5n-Vg „-5

1.2

where SMM is the cross-sectional area of the auxiliary magnetic circuit between the vertical plates, BS is the technical induction value

Thus, the introduction of an auxiliary magnetic circuit, made of magnetically soft material, makes it possible to almost completely eliminate the non-magnetically electromagnetic saturation of the material 45 by the sensing residual magnetic flux.

(in the passive state) and exclude the sticking of ferromagnetic junk, which reduces the strength of the magnetic capture in the active state.

auxiliary yes, T;

В .. and В ™ is the residual magnetic induction of materials, respectively, of a non-magnetisable and reversible permanent magnets, T;

Su-areas of cross-sections of non-magnetizable and magnetisable permanent magnets, respectively

50

Claims (2)

Invention Formula Magnetic capture auth. St. No. 1068366, characterized in that, in order to increase reliability and productivity of work, it is provided with an auxiliary magnetic circuit. The magnetic gripper operates by the following 55 made of a magnetically soft material and a vertical attached rigidly to the ends. For transferring the magnetic gripping into the passive plates, the surface area of the vertical plaque 5 of the control is given a current pulse of this direction, that the magnetizable permanent magnet 1 becomes magnetized according to (indicated by the letters / V and S in brackets) non-magnetizable permanent magnet 2. At the same time, the main part of the residual magnetic fluxes of the magnetisable and non-magnetizable permanent magnets is closed between their opposite poles through the magnetic vertical plates 3 and the magnetically soft inserts 4. 6. Herewith, due to the appropriate choice of the cross section of the auxiliary magnetic circuit, in which the uncompensated residual flow does not saturate an auxiliary magnetic material, the latter shunts magnetically vertical plates, between which the potential difference is almost zero. This causes the working magnetic flux to be zero and the load holding force 7. To seize the load 7 (transferring the magnetic gripping to the passive state), a control current is applied to the control winding 5 in such a direction that the reversible permanent magnet 1 becomes magnetized opposite (indicated by the letters / V and S without brackets) to the nonremagnetized permanent magnet 2. In this case, the flux of both magnets is summed, closing through the magnet the soft inserts 4, the vertical plates 3, the working magnetic the gap and the ferromagnetic load 7. A part of the total magnet of the first flow branches into the auxiliary magnetic circuit 6, which, due to the saturation of its material, takes up a small part of the total magnetic flux. Thus, the introduction of an auxiliary magnetic circuit made of magnetically soft material makes it possible to almost completely eliminate a few Invention Formula  plates, while the surface area the contact of each vertical plate with an auxiliary magnetic circuit is greater than or equal to ten areas, the cross section of the auxiliary magnetic circuit, and the cross-sectional area of the auxiliary magnetic core between the vertical plates, non-magnetizable and remagnetized magnets, and the induction of technical magnetic saturation of the material of the auxiliary magnetic core and residual magnetic materials non-magnetizable and magnetizable permanent magnets are in proportion 4J -5l p L i2 1D, / where 5vii is the cross-sectional area of the auxiliary magnetic conductor between the vertical walls, fij is the magnitude of the induction of technical magnetic saturation of the material of the auxiliary magnetic conductor, T;  Br „is the residual magnetic induction of materials, respectively, of a non-remagnetisable and reversible permanent magnets, T; 5 „and 5 - the cross-sectional area, respectively, of a non-magnetisable and remagnetized permanent magnets, m.